Zions Bancorporation

Zions Bancorporation, National Association is a nationally chartered bank and bank holding company headquartered in Salt Lake City, Utah, with roughly $87 billion in total assets. It is a super-regional operating a single national bank charter across seven regional divisional brands - Zions Bank, Amegy Bank, California Bank & Trust, National Bank of Arizona, Nevada State Bank, Vectra Bank Colorado, and The Commerce Bank of Washington - serving consumers, small business, and commercial/treasury clients across the Western United States. On the open-finance front Zions runs NO public first-party developer API portal: developer.zionsbank.com and api.zionsbank.com do not resolve, and its business digital-banking surface (Treasury Internet Banking at treasurygateway.zionsbank.com) is credential-gated with no published API reference or downloadable OpenAPI. As a large depository institution it is subject to the CFPB Section 1033 Personal Financial Data Rights rule, but Zions has not published a first-party data-access API or a documented FDX-conformant endpoint; consumer-permissioned data sharing in practice reaches Zions through third-party aggregators (Plaid/MX/Finicity/Akoya) rather than a first-party API surface.

Zions Bancorporation is profiled on the APIs.io network. Tagged areas include Financial Services, Banking, United States, Super-Regional Bank, and Treasury Management.

Zions Bancorporation’s developer surface includes documentation and 3 more developer resources.

🌐 Visit website 📡 Source on GitHub
9.2/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5
0 APIs
Financial ServicesBankingUnited StatesSuper-Regional BankTreasury ManagementOpen FinanceData Aggregation

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 9.2/100 · minimal
Contract Quality 0.0 / 25
Developer Ergonomics 1.7 / 20
Commercial Clarity 0.0 / 20
Operational Transparency 0.0 / 13
Governance 0.0 / 12
Discoverability 6.8 / 10
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/zions-bancorporation: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Zions Bancorporation Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Company 2

The organization behind the API

Website
Website
 LinkedIn
LinkedIn

Source (apis.yml)

apis.yml Raw ↑ 
aid: zions-bancorporation
url: https://raw.githubusercontent.com/api-evangelist/zions-bancorporation/refs/heads/main/apis.yml
name: Zions Bancorporation
kind: company
description: 'Zions Bancorporation, National Association is a nationally chartered bank and bank holding company headquartered
  in Salt Lake City, Utah, with roughly $87 billion in total assets. It is a super-regional operating a single national bank
  charter across seven regional divisional brands - Zions Bank, Amegy Bank, California Bank & Trust, National Bank of Arizona,
  Nevada State Bank, Vectra Bank Colorado, and The Commerce Bank of Washington - serving consumers, small business, and commercial/treasury
  clients across the Western United States. On the open-finance front Zions runs NO public first-party developer API portal:
  developer.zionsbank.com and api.zionsbank.com do not resolve, and its business digital-banking surface (Treasury Internet
  Banking at treasurygateway.zionsbank.com) is credential-gated with no published API reference or downloadable OpenAPI. As
  a large depository institution it is subject to the CFPB Section 1033 Personal Financial Data Rights rule, but Zions has
  not published a first-party data-access API or a documented FDX-conformant endpoint; consumer-permissioned data sharing
  in practice reaches Zions through third-party aggregators (Plaid/MX/Finicity/Akoya) rather than a first-party API surface.'
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Financial Services
- Banking
- United States
- Super-Regional Bank
- Treasury Management
- Open Finance
- Data Aggregation
created: '2026-07-23'
modified: '2026-07-23'
specificationVersion: '0.19'
apis: []
common:
- type: DomainSecurity
  url: security/zions-bancorporation-domain-security.yml
- type: Website
  url: https://www.zionsbancorporation.com/
- type: Documentation
  url: https://www.zionsbank.com/business/treasury/treasury-internet-banking/
- type: LinkedIn
  url: https://www.linkedin.com/company/zions-bancorporation
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com